Which term refers to being free from personal opinions or past experiences, and thus being unbiased?

The term that refers to being free from personal opinions or past experiences, and thus being unbiased, is objectivity. Objectivity is a critical concept in psychology and research, as it emphasizes the importance of approaching situations, data, and evaluations without the influence of personal biases or emotions. This approach allows for a more accurate and reliable examination of facts and evidence, making it essential in scientific inquiry and assessments.

In contrast, subjectivity involves personal feelings, interpretations, or opinions that can affect one's perspective. Neutrality can suggest a lack of bias, but it may not fully encompass the rigorous and systematic approach that objectivity entails. Impartiality also signifies fairness and the absence of bias, yet objectivity specifically denotes a methodological approach aimed at strictly adhering to observable phenomena and quantifiable evidence.

Thus, objectivity is the most precise term for the concept described in the question, as it encapsulates the idea of making assessments and conclusions based solely on external facts rather than internal influences.